Mounting for rock-drills.



" PATNNTND JAN. 29, 1907.

M. HARDSOGG. MOUNTING NON ROCK DRILLS,

a DZ l l l I f G APPLICATION FILED JULY 12, 1904 THE NaRms PsrsRs co.,wAsHlolcroN, p. c4

vbe revolved to outwardly project the ends of UNITED STATES MARTINHARDSOCG, OF OTTUMWA, IOWA.

MOUNTING FOR Specification of Letters Patent.

Patented J'an. 29, 1907.

Application filed July 12,1904. Serial No. Zl.275.

To afi/Z whom, it may concern:

Be it known that I, MARTIN HARDsocG, a citizen of the United States,residing at Ottumwa, in the county of I/Vapello and State of Iowa, haveinvented certain new and use,- ful Improvements in Mountings for Rock-Drills, of which the following is a specification.

The object of the present invention is to provide a standard or mountingfor rockdrills which shall enable a wide range of adjustment of thedrill and increase its range and field of operation.

A second object is to provide means for inwardly projecting the drill asa cut is being made and at the same time enable the drillingbit to begiven a rotary as well as a reciproeating motion, thereby increasing theefliciency of the drill and its speed of operation.

A third object of the invention is to pro vide a rigid support adaptedto be set up in tunnels or cuts of varying diameter and shape and toenable the use therewith of a drill of larger diameter and heavierstroke than could be readily operated by hand.

The invention consists in the features of construction and combinationof parts hereinafter described and claimed.

In the drawings illustrating the invention, Figure 1 is a view showingthe mounting or support having attached thereto two rockdrill's, andFig. 2 a view showing the mounting arranged in upright position andhaving attached thereto a single drill.

The support is constructed of a column or pipe A of suitable length,into the ends of which are loosely inserted screws c of suitable length,the degree of adjustment of the column depending largely upon the lengthof the screws and their extent of projection, and each of the screws atits end terminates in an abutment a', adapted to contact the walls of amine-tunnel or other support, land said screws are adapted to beoutwardly projected by means of wing-nuts B, which bear against the endsof the column or pipe. The wing-nuts are provided with arms l), whichenable their easy rotation, so that after the column or support has beeninserted between the walls of a mine-tunnel or between uprights, asshown in Fig. l, the wing-nuts can the screws to force said ends intoany crevices or irregularities, thereby firmly anchoring the supportpreparatory to the drilling operation.

Upon the support are mounted one or more straps or collars C, dependingupon the number of drills which it is desirable to operate, and each ofsaid straps or collars terminates in ears c. The ears serve as amounting for one or more pneumatic drills D, into the smooth-boretubular shank ends D of which are inserted feeding-screws d, terminatingin tongues d', which are pivoted between the ears by means ofpivot-bolts d2, having on their ends nuts d3 for enabling theiradjustment. Each of the drills is provided near the rear of the tubularextension or barrel with an arm or handle E for advancing the drillduring the drilling operation, and behind the handle is a follower-nut efor locking the drill in position after it has been shoved forward onthe feeding-screw by means of the handle E. Air is supplied to the drillthrough a pipe F, which enters the shank of the feeding-screw d andcommunicates with a duct F therein, and to said pipe is attached arubber hose f for admitting air -under pressure, and the ilow of saidair under pressure is controlled by means of a valve f or any othersuitable means.

The parts heretofore described can be set up as shown in Fig. 2 wherethe conditions are such as to prevent the adjustment of the standard orsupport between two side walls or supports, such as shown in Fig. l. Inthis case the support A is set upright and the screws a removedtherefrom, and one of said screws can be then secured to the upper endof the support by means of one of the collars C, and said screw is thenentered into a diagonal brace A', which is provided at its end with apeg c2, adapted. to be forced into a crevice in the rock or elsewhere,after which the parts are tightened and adjusted by means of a wing-nuta3, which firmly drives the peg into the ground and forms a irm andrigid support for the standard, enablingfthe drill to be secured theretoin the same manner heretofore described. When the apparatus is set up inthis way, the drill itself by its contact with the rock to be operatedupon prevents the forward projection of the standard or column, so thata rigid mounting is provided.

The operation of the device will be partially understood from theforegoing description, but may be briefly stated as follows: After thecolumn has been anchored the col- IOO IIO

along the column to the desired position and then clamped by tighteningthe nuts, after which the drill may be swung on its pivot in the arc ofa circle until the desired point has been reached for drilling the hole,When such adjustment has been made, the drill will be projectedforwardly by moving the handle E, which carries the drill along thescrew d until the bit of the drill contacts the point at which the holeis to be made, after which air under pressure is admitted and thedrilling operation begins. As the bit advances vinto the hole -thehandle is turned, which serves the purpose of revolving the drill tofacilitate the drilling operation, and the drill .is advanced from timeto time by shoving it lower-nut the back kick of the hammer islprevented, which would impair its use unmounted, so that the entireforce of the hammer is expended on the bit and the drilling operationgreatly facilitated.

The device is simple in its operation and may be applied to or used withhammers of any usual and well-known variety, and the length of saidhammer and its proportion can be varied without departing in any wayfrom the spirit of the invention.

What I regard as new, and desire to secure by Letters Patent, is

1. A mounting for rock-drills, consisting of a support adapted to bemaintained in suitable position with respect to a fixed abutment, ascrew between the support and the abutment, a nut for regulating thepressure exerted by the screw against the support, in combination with arock-drill having an extension or barrel rigidly secured thereto, a

tubular screw-threaded shank adjustably secured to the support andentered into the extension or barrel and provided with apresvwardly-projecting portion of the screw and adapted to bear againstthe end of the tubular support for regulating the position of the screw,a collar adjustable on the support, in combination with a rock-drillhaving an extension'or a barrel rigidly secured thereto, ascrew-threaded tubular shank pivoted at one end to the collar and havingits opposite end entered into the extension or barrel, a pressure-supplypipe entering the tubular shank for supplying pressure to the'barreh ahandle on the extension or barrel 'for regulating the position of thebarrel with respect to the screw-threaded shank, and a lock-nut forholding the barrel and drill in projected position, substantially asdescribed.

3. A mounting for ro ck-drills, consisting of a tubular support, screwsslidably mounted in the ends oi' the support, winged nuts screw-threadedonto the screws and adapted to bear against the ends or' the tubularsup- 'port for outwardly projecting the screws therefrom, a collaradjustable on the support, in combination with a rock-drill having anextension or barrel rigidly secure d thereto, a tubular screw-threadedshank pivoted to the collar and having its opposite end entered into theextension or barrel, an adjustable handle secured to the drill torsliding the barrel along the screw-threaded shank during the drillingoperation, and a 'follower-nut for locking the barrel and drill inprojected position, substantially as described.

MARTIN HARDSOCG. l/Vitnesses H. M, SHEPARD. A. V. BOHN.

